How can I connect to Memgraph from my C# application? - graph-databases

Question

I have data stored in dockerized Memgraph database. How can I connect from my C# app to the database?

Answer 1

You have to use Neo4j.Driver.Simple package which implements a blocking interface around the 'main' driver.
Once you have the latest version of driver installed you can connect to your database using one of the ways.
First way:
using System;
using System.Linq;
using Neo4j.Driver;
namespace MemgraphApp
{
public class Program
{
public static void Main()
{
string message = "Hello, World!";
using var _driver = GraphDatabase.Driver("bolt://localhost:7687", AuthTokens.None);
using var session = _driver.Session();
var greeting = session.WriteTransaction(tx =>
{
var result = tx.Run("CREATE (n:FirstNode) " +
"SET n.message = $message " +
"RETURN 'Node ' + id(n) + ': ' + n.message",
new { message });
return result.Single()[0].As<string>();
});
Console.WriteLine(greeting);
}
}
}
Second way:
using System;
using System.Linq;
using Neo4j.Driver;
namespace MemgraphApp
{
public class Program : IDisposable
{
private readonly IDriver _driver;
public Program(string uri, string user, string password)
{
_driver = GraphDatabase.Driver(uri, AuthTokens.Basic(user, password));
}
public void PrintGreeting(string message)
{
using (var session = _driver.Session())
{
var greeting = session.WriteTransaction(tx =>
{
var result = tx.Run("CREATE (n:FirstNode) " +
"SET n.message = $message " +
"RETURN 'Node ' + id(n) + ': ' + n.message",
new { message });
return result.Single()[0].As<string>();
});
Console.WriteLine(greeting);
}
}
public void Dispose()
{
_driver?.Dispose();
}
public static void Main()
{
using (var greeter = new Program("bolt://localhost:7687", "", ""))
{
greeter.PrintGreeting("Hello, World!");
}
}
}
}
Detailed instructions can be found at https://memgraph.com/docs/memgraph/connect-to-memgraph/drivers/c-sharp.